1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
|
/*
* Copyright (c) 2016 Mellanox Technologies. All rights reserved.
* Copyright (c) 2016 Vadim Pasternak <vadimp@mellanox.com>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the names of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* Alternatively, this software may be distributed under the terms of the
* GNU General Public License ("GPL") version 2 as published by the Free
* Software Foundation.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/i2c-mux.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/i2c-mux-reg.h>
#define MLX_PLAT_DEVICE_NAME "mlxplat"
/* LPC bus IO offsets */
#define MLXPLAT_CPLD_LPC_I2C_BASE_ADRR 0x2000
#define MLXPLAT_CPLD_LPC_REG_BASE_ADRR 0x2500
#define MLXPLAT_CPLD_LPC_IO_RANGE 0x100
#define MLXPLAT_CPLD_LPC_I2C_CH1_OFF 0xdb
#define MLXPLAT_CPLD_LPC_I2C_CH2_OFF 0xda
#define MLXPLAT_CPLD_LPC_PIO_OFFSET 0x10000UL
#define MLXPLAT_CPLD_LPC_REG1 ((MLXPLAT_CPLD_LPC_REG_BASE_ADRR + \
MLXPLAT_CPLD_LPC_I2C_CH1_OFF) | \
MLXPLAT_CPLD_LPC_PIO_OFFSET)
#define MLXPLAT_CPLD_LPC_REG2 ((MLXPLAT_CPLD_LPC_REG_BASE_ADRR + \
MLXPLAT_CPLD_LPC_I2C_CH2_OFF) | \
MLXPLAT_CPLD_LPC_PIO_OFFSET)
/* Start channel numbers */
#define MLXPLAT_CPLD_CH1 2
#define MLXPLAT_CPLD_CH2 10
/* Number of LPC attached MUX platform devices */
#define MLXPLAT_CPLD_LPC_MUX_DEVS 2
/* mlxplat_priv - platform private data
* @pdev_i2c - i2c controller platform device
* @pdev_mux - array of mux platform devices
*/
struct mlxplat_priv {
struct platform_device *pdev_i2c;
struct platform_device *pdev_mux[MLXPLAT_CPLD_LPC_MUX_DEVS];
};
/* Regions for LPC I2C controller and LPC base register space */
static const struct resource mlxplat_lpc_resources[] = {
[0] = DEFINE_RES_NAMED(MLXPLAT_CPLD_LPC_I2C_BASE_ADRR,
MLXPLAT_CPLD_LPC_IO_RANGE,
"mlxplat_cpld_lpc_i2c_ctrl", IORESOURCE_IO),
[1] = DEFINE_RES_NAMED(MLXPLAT_CPLD_LPC_REG_BASE_ADRR,
MLXPLAT_CPLD_LPC_IO_RANGE,
"mlxplat_cpld_lpc_regs",
IORESOURCE_IO),
};
/* Platform default channels */
static const int mlxplat_default_channels[][8] = {
{
MLXPLAT_CPLD_CH1, MLXPLAT_CPLD_CH1 + 1, MLXPLAT_CPLD_CH1 + 2,
MLXPLAT_CPLD_CH1 + 3, MLXPLAT_CPLD_CH1 + 4, MLXPLAT_CPLD_CH1 +
5, MLXPLAT_CPLD_CH1 + 6, MLXPLAT_CPLD_CH1 + 7
},
{
MLXPLAT_CPLD_CH2, MLXPLAT_CPLD_CH2 + 1, MLXPLAT_CPLD_CH2 + 2,
MLXPLAT_CPLD_CH2 + 3, MLXPLAT_CPLD_CH2 + 4, MLXPLAT_CPLD_CH2 +
5, MLXPLAT_CPLD_CH2 + 6, MLXPLAT_CPLD_CH2 + 7
},
};
/* Platform channels for MSN21xx system family */
static const int mlxplat_msn21xx_channels[] = { 1, 2, 3, 4, 5, 6, 7, 8 };
/* Platform mux data */
static struct i2c_mux_reg_platform_data mlxplat_mux_data[] = {
{
.parent = 1,
.base_nr = MLXPLAT_CPLD_CH1,
.write_only = 1,
.reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG1,
.reg_size = 1,
.idle_in_use = 1,
},
{
.parent = 1,
.base_nr = MLXPLAT_CPLD_CH2,
.write_only = 1,
.reg = (void __iomem *)MLXPLAT_CPLD_LPC_REG2,
.reg_size = 1,
.idle_in_use = 1,
},
};
static struct platform_device *mlxplat_dev;
static int __init mlxplat_dmi_default_matched(const struct dmi_system_id *dmi)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
mlxplat_mux_data[i].values = mlxplat_default_channels[i];
mlxplat_mux_data[i].n_values =
ARRAY_SIZE(mlxplat_default_channels[i]);
}
return 1;
};
static int __init mlxplat_dmi_msn21xx_matched(const struct dmi_system_id *dmi)
{
int i;
for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
mlxplat_mux_data[i].values = mlxplat_msn21xx_channels;
mlxplat_mux_data[i].n_values =
ARRAY_SIZE(mlxplat_msn21xx_channels);
}
return 1;
};
static struct dmi_system_id mlxplat_dmi_table[] __initdata = {
{
.callback = mlxplat_dmi_default_matched,
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
DMI_MATCH(DMI_PRODUCT_NAME, "MSN24"),
},
},
{
.callback = mlxplat_dmi_default_matched,
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
DMI_MATCH(DMI_PRODUCT_NAME, "MSN27"),
},
},
{
.callback = mlxplat_dmi_default_matched,
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
DMI_MATCH(DMI_PRODUCT_NAME, "MSB"),
},
},
{
.callback = mlxplat_dmi_default_matched,
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
DMI_MATCH(DMI_PRODUCT_NAME, "MSX"),
},
},
{
.callback = mlxplat_dmi_msn21xx_matched,
.matches = {
DMI_MATCH(DMI_BOARD_VENDOR, "Mellanox Technologies"),
DMI_MATCH(DMI_PRODUCT_NAME, "MSN21"),
},
},
{ }
};
static int __init mlxplat_init(void)
{
struct mlxplat_priv *priv;
int i, err;
if (!dmi_check_system(mlxplat_dmi_table))
return -ENODEV;
mlxplat_dev = platform_device_register_simple(MLX_PLAT_DEVICE_NAME, -1,
mlxplat_lpc_resources,
ARRAY_SIZE(mlxplat_lpc_resources));
if (IS_ERR(mlxplat_dev))
return PTR_ERR(mlxplat_dev);
priv = devm_kzalloc(&mlxplat_dev->dev, sizeof(struct mlxplat_priv),
GFP_KERNEL);
if (!priv) {
err = -ENOMEM;
goto fail_alloc;
}
platform_set_drvdata(mlxplat_dev, priv);
priv->pdev_i2c = platform_device_register_simple("i2c_mlxcpld", -1,
NULL, 0);
if (IS_ERR(priv->pdev_i2c)) {
err = PTR_ERR(priv->pdev_i2c);
goto fail_alloc;
}
for (i = 0; i < ARRAY_SIZE(mlxplat_mux_data); i++) {
priv->pdev_mux[i] = platform_device_register_resndata(
&mlxplat_dev->dev,
"i2c-mux-reg", i, NULL,
0, &mlxplat_mux_data[i],
sizeof(mlxplat_mux_data[i]));
if (IS_ERR(priv->pdev_mux[i])) {
err = PTR_ERR(priv->pdev_mux[i]);
goto fail_platform_mux_register;
}
}
return 0;
fail_platform_mux_register:
for (i--; i > 0 ; i--)
platform_device_unregister(priv->pdev_mux[i]);
platform_device_unregister(priv->pdev_i2c);
fail_alloc:
platform_device_unregister(mlxplat_dev);
return err;
}
module_init(mlxplat_init);
static void __exit mlxplat_exit(void)
{
struct mlxplat_priv *priv = platform_get_drvdata(mlxplat_dev);
int i;
for (i = ARRAY_SIZE(mlxplat_mux_data) - 1; i >= 0 ; i--)
platform_device_unregister(priv->pdev_mux[i]);
platform_device_unregister(priv->pdev_i2c);
platform_device_unregister(mlxplat_dev);
}
module_exit(mlxplat_exit);
MODULE_AUTHOR("Vadim Pasternak (vadimp@mellanox.com)");
MODULE_DESCRIPTION("Mellanox platform driver");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("dmi:*:*Mellanox*:MSN24*:");
MODULE_ALIAS("dmi:*:*Mellanox*:MSN27*:");
MODULE_ALIAS("dmi:*:*Mellanox*:MSB*:");
MODULE_ALIAS("dmi:*:*Mellanox*:MSX*:");
MODULE_ALIAS("dmi:*:*Mellanox*:MSN21*:");
|
